Depo shot

I’ve been on the Depo for over a year now, and since my second shot I’ve not had a period at all, no cramps, no spotting or blood, nothing at all..

Up until this month, I’ve recently started having dark brown blood that I used to get at the end of my periods, not a lot and I only notice blood when wiping after peeing..

I know Depo shots can cause irregular bleeding but due to not having any periods or blood at all for a year now, I’m not sure if this is normal or not

Has anyone experienced similar or can give advice?

Thank you